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Yamatoite Mineral Data
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General Yamatoite Information
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 Chemical Formula: |
(Mn++,Ca)3(V+++,Al)2(SiO4)3 |
| Composition: |
Molecular Weight = 519.82 gm |
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Calcium 5.78 % Ca 8.09 % CaO |
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Manganese 23.78 % Mn 30.70 % MnO |
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Aluminum 2.60 % Al 4.90 % Al2O3 |
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Vanadium 14.70 % V 21.62 % V2O3 |
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Silicon 16.21 % Si 34.68 % SiO2 |
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Oxygen 36.93 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+2.25Ca0.75V3+1.5Al0.5(SiO4)3 |
| Environment: |
Discredited as Mn goldmanite, yet to be found in nature. A hypothicical Mn-V-dominant garnet end member. |
| IMA Status: |
Discredited IMA 1967 (Dana # Added) |
| Locality: |
Yamato mine, Kagoshima prefecture, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
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Yamatoite Crystallography
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| Cell Dimensions: |
a = 11.97, Z = 5; V = 1,715.07 Den(Calc)= 2.52 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d |
| X Ray Diffraction: |
By Intensity(I/Io): 2.69(1), 3.01(0.7), 1.61(0.5),2.45(0.4), 1.67(0.2), 1.95(0.2), 2.19(0.2), 2.36(0.2), |
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Physical Properties of Yamatoite
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| Cleavage: |
None |
| Color: |
Honey yellow, Dark red. |
| Hardness: |
6-7 - Orthoclase-Quartz |
| Streak: |
white |
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Optical Properties of Yamatoite
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| Gladstone-Dale: |
CI calc= -0.512 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3327,KC= 0.2201
Ncalc = 1.55 |
| Optical Data: |
Isotropic, n=1.822-1.855. |
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Calculated Properties of Yamatoite
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| Electron Density: |
Bulk Density (Electron Density)=2.43 gm/cc
note: Specific Gravity of Yamatoite =2.52 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0081923223
Boson Index = 0.9918076777 |
| Photoelectric: |
PEYamatoite = 10.33 barns/electron
U=PEYamatoite x rElectron Density= 25.07 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yamatoite is Not Radioactive |
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Yamatoite Classification
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| Dana Class: |
51.04.03b.05 (51)Nesosilicate Insular SiO4 Groups Only |
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(51.04)with cations in [6] and >[6] coordination |
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(51.04.03b)Garnet group (Ugrandite series) |
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51.04.03b.01 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m |
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51.04.03b.02 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m |
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51.04.03b.03 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m |
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51.04.03b.04 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m |
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51.04.03b.05 Yamatoite? (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m |
| Strunz Class: |
09.AX.00 09 - SILICATES (Germanates) |
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09.A - Unclassified Strunz Nesosilicates |
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09.AX -Garnet - Mn |
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09.AX.00 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m |
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09.AX.00 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m |
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Other Yamatoite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) |
| See Also: |
Links to other databases for Yamatoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Yamatoite Specimen Label here :
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Yamatoite
(Mn++,Ca)3(V+++,Al)2(SiO4)3
Dana No: 51.04.03b.05 Strunz No: 09.AX.00
Locality:
Notes:
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